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Title: Noise-induced polarization switching in complex networks
Author: Haerter, J. O.
Díaz Guilera, Albert
Serrano Moral, Ma. Ángeles (María Ángeles)
Keywords: Física estadística
Sistemes complexos
Fluctuacions (Física)
Rutes aleatòries (Matemàtica)
Xarxes complexes (Matemàtica)
Statistical physics
Complex systems
Fluctuations (Physics)
Random walks (Mathematics)
Complex networks (Physics)
Issue Date: 11-Apr-2017
Publisher: American Physical Society
Abstract: The combination of bistability and noise is ubiquitous in complex systems, from biology to social interactions, and has important implications for their functioning and resilience. Here we use a simple three-state dynamical process, in which nodes go from one pole to another through an intermediate state, to show that noise can induce polarization switching in bistable systems if dynamical correlations are significant. In large, fully connected networks, where dynamical correlations can be neglected, increasing noise yields a collapse of bistability to an unpolarized configuration where the three possible states of the nodes are equally likely. In contrast, increased noise induces abrupt and irreversible polarization switching in sparsely connected networks. In multiplexes, where each layer can have a different polarization tendency, one layer is dominant and progressively imposes its polarization state on the other, offsetting or promoting the ability of noise to switch its polarization. Overall, we show that the interplay of noise and dynamical correlations can yield discontinuous transitions between extremes, which cannot be explained by a simple mean-field description.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2017, vol. 95, p. 042305
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ISSN: 1539-3755
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)
Articles publicats en revistes (Institut de Recerca en Sistemes Complexos (UBICS))
Publicacions de projectes de recerca finançats per la UE

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